OAuth2Study/OAuth2Studyl.OAuthClient/BaseUrlExt.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace OAuth2Studyl.OAuthClient
{
    public static class BaseUrlExt
    {
        public static string UrlDomain(this HttpRequestBase requestBase)
        {
            if (requestBase == null)
            {
                throw new ArgumentNullException("requestBase","参数不能为空");
            }

           return requestBase.Url.ToString().Split('?')[0];
        }
    }
}